[BUG] import_util `json()` procedure fails when file contains unicode characters

[QazCetelic]

Describe the bug
Using the import utility with JSON files containing unicode characters fails.

To Reproduce

1. Add example JSON file, containing ë.
   example.json

[
    {
        "id": 7902,
        "labels": [
            "Foo"
        ],
        "type": "node",
        "properties": {
            "name": "Categorieën"
        }
    }
]

2. Import it

CALL import_util.json("/data/example.json")

3. See error

(click to show)

import_util.json: Traceback (most recent call last):
  File "/usr/lib/memgraph/query_modules/import_util.py", line 335, in json
    graph_objects = js.load(file)
                    ^^^^^^^^^^^^^
  File "/usr/lib/python3.12/json/__init__.py", line 293, in load
    return loads(fp.read(),
                 ^^^^^^^^^
  File "/usr/lib/python3.12/encodings/ascii.py", line 26, in decode
    return codecs.ascii_decode(input, self.errors)[0]
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 163: ordinal not in range(128)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/memgraph/query_modules/import_util.py", line 337, in json
    raise OSError("Could not open/read file.")
OSError: Could not open/read file.

Expected behavior
It should be able to import files containing Unicode characters.

Additional context
The issue is caused by https://github.com/memgraph/mage/blob/c72865104f09b8b71b03f7b14136f72376332fa3/python/import_util.py#L334

try:
    with open(path, "r") as file: # <- this opens it with ASCII encoding which fails with many characters
            graph_objects = js.load(file)
    except Exception:
        raise OSError("Could not open/read file.")

This can probably be fixed by using with open(path, 'r', encoding="utf-8") as f:. This should support more characters and is backwards compatible with ASCII (all valid ASCII is valid UTF8).